Loop-taking device for sewing-machines.



J. LINDEBERG.

LOOP TAKING DEVICE FOR SEWING MACHINES.

APPLICATION FILED JULY 23, 1902.

1,098,276, Patented May 26, 1914.

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JOHN LINDEBER-G, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LOOP-TAKING DEVICE FOR SEWING-MACHINES.

To all tar/10m it may concern Be it known that I, JOHN LINDEBERG, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Loop-Taking Devices for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

The present invention relates to an improvement in overseaming machines of the type employing a spreader, which is arranged to take a loop of needle thread and carry it into position to be engaged by another device, which carries the thread over the edge of the fabric into position to be en gaged by the needle.

The invention is herein shown as applied to a machine embodying a vertically reciprocating needle, a thread carrying looper oscillating above the cloth plate of the machine and a spreader arranged to take a loop of needle thread, carry it out beyondthe edge of the fabric and above'the same, into position to be engaged by the looper, which carries its own thread into position to be engaged by the needle in its next descent, such a machine being known in the art as the Union Special single interlock machine and illustrated in various applicatlons for Letters Patent filed by R. G. lVoodward, either alone or jointly with other parties, but for a general description of the machine and its mode of operation, reference may be had to the patent granted to Lansing Onderdonk and Russel G. WVoodward on the 27th day of November, 1906, No. 837,106.

In the spreader which has been heretofore used in such machines, considerable difiiculty has been experienced in the failure of said spreader to properly cast the loop or back out of the same at the proper time, and let go of the same in passing from one piece of goods to the other, when the needle does not pass through the fabric; that is, when the needle is chaining off between two pieces of fabric, the difiiculty being experienced by reason of the fact that the hooked end of the spreader would hold on to the loop as the spreader moved back, and thus cause failure of the looper to properly engage with the needle loop on the spreader.

The object of the present invention, therefore, is to provide a spreader to avoid these Specification of Letters Patent.

Application filed. July 23., 1902.

Patented May 26, 1914. Serial No. 116,664.

defects and the invention therefore consists in a spreader constructed as hereinafter described and referred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which' Figures 1, 2, 3, 4 and 5 represent different positions of the needle, looper and spreader in the formation of the stitch; Fig. 6 is a side elevation of the spreader in detail; Fig. 7 is a view taken from the right of Fig. 6, and Fig. 8 is a view of the opposite side of the spreader from Fig. 6. Fig. 9 is a view illustrating the spreader taking the loop.

from the needle; Fig. 10 is a view illustratmg the properly formed loop with the thread caught over the hook or spreader and held there by the projection on the beak, the looper passing through the loop; and Fig.

ll is a view illustrating the needle taking a loop from the looper and the thread about to be cast off from the spreader.

In these drawings, A represents the reciprocating needle, B the looper and S the spreader. The spreader has a suitable shank engaging in the socket 1, and as shown more clearly in Figs. 6, 7 and 8, said spreader has an angular projecting portion 2, a hook 3 on the upper end, the opposite face of the spreader extending out practically straight and flush to a point 5 even with the upper edge of the hook. By this arrangement of running the point 5 out as a continuation of the body part and making the spreader of suitable thickness, all danger of the thread catching upon the hook and being held a longer time than is desirable, is avoided. The shoulder, atthe upper edge of the hook also serves to support one strand in the loop carried by the spreader, while the other strand extends beneath the hook. This position of the loop serves to spread the loop and hold the same for the entrance of the looper B, which moves across the plane of movement of the spreader S. The part 6 acts in this spreader as a needle guard, substantially as. in the well known Union Special bag overseaming machine, disclosed in the application for patent filed by R. G. lVoodward, April 8, 1901, Serial No. 54,897.

By making the outer side face of the point 5 substantially flush with the body of the spreader, the loop held thereon will readily slip oif to the beak of the spreader and then be released thereby, whereas in the former construction, the point being not in a continuous straight line with the body of the spreader, the loop would catch on the point and not properly pass over to the beak.

As shown in Fig. 9, the spreader is taking the loop from the needle, while in Fig. 10 is illustrated a properly formed loop with the thread caught over the hook or spreader and held there by the projection on the beak, the looper passing through the loop.

Fig. 11 illustrates a needle as taking a loop from the looper and the thread about to be cast ofli from the spreader.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is

1. A sewing machine including in combination, a needle, a thread-carrying member cooperating with the needle comprising a body portion having the face adjacent the needle lying in a plane substantially parallel to the path of movement of the needle, a loop-engaging beak on the side of the looper body adjacent the needle and extend ing substantially at right angles to the longitudinal axis of said body portion, and a loop-supporting member formed on said body portion at the base of said beak and on the opposite side of said body portion from said beak for engaging and supporting the loop, whereby the loop carried by said supporting member may be readily cast off on to said beak and then released thereby.

2. In a sewing machine, suitable stitchforming mechanism including a spreader or looping hook comprising a body portion formed at its upper end with a beak and having adjacent the beak a casting off point formed substantially in alinement with the body of the spreader, said spreader being provided with an integral needle guard.

3. In a sewing machine, suitable stitchforming mechanism, including a spreader or looping hook having a body portion formed at its upper end with a forwardly projecting beak or hook, and having upon. the opposite side from the beak or hook a point extending above the body portion, with its side face substantially flush therewith, the apex of said point being substantially in horizontal alinement with the upper face of the beak or hook, but separated therefrom, and the point of the beak or hook extending horizontally in advance of said point referred to, whereby when the point of the beak or hook enters the loop, one side of said loop may be cast olf by the point upon the opposite side of the spreader from the beak or hook, and guided on to said beak or hook, and then be released thereby.

In testimony whereof I aiiiX my signature in presence of two witnesses.

JOHN LINDEBERG.

Witnesses:

CHESTER MGNEIL, R. TAUBERT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

